Wire gauge recommendation
To get the most efficent charging to my batteries, with cost kept in mind, what wire gauge should I use between the batteries and charger? I have a pair of 6v gc batteries. They're about 12-15 fee...
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You could add a second wire for much less money, just run a second #8 or #6 wire next to the wires already going to the battery. Then each #6 wire would carry a maximum of only about 30 amps, and you cold barely measure the voltage drop.
Your 75 amp charger probably will never put out 75 amps. As soon as the batteries see 14.4 volts, the charge rate starts to fall off, and you will see it is 45 amps within 15 minutes and 35 amps after the first hour or so. This is what I see with my 4 golf cart batteries, and my Trace M1512 inverter/charger. IT is rated at 70 amps charging, and the wire size is 000 to accommodate the 150 amp load the inverter can put on the batteries.
I actually will usually set my charger to max charge rate of 60% (42 amps) so the battery will not get warm during charging.
Have fun camping!
Fred.
Your 75 amp charger probably will never put out 75 amps. As soon as the batteries see 14.4 volts, the charge rate starts to fall off, and you will see it is 45 amps within 15 minutes and 35 amps after the first hour or so. This is what I see with my 4 golf cart batteries, and my Trace M1512 inverter/charger. IT is rated at 70 amps charging, and the wire size is 000 to accommodate the 150 amp load the inverter can put on the batteries.
I actually will usually set my charger to max charge rate of 60% (42 amps) so the battery will not get warm during charging.
Have fun camping!
Fred.
